SMBJ8.5CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ8.5CAHM3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient overvoltage protection. This component features a reverse standoff voltage of 8.5V, a clamping voltage of 14.4V at peak pulse current, and a peak pulse power rating of 600W in a surface mount DO-214AA (SMB) package. The part is qualified to AEC-Q101 automotive standards and is ROHS3 compliant.

The SMBJ8.5CAHM3_A/I is currently listed as obsolete. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring this specific electrical and mechanical specification.

Substiute Parts

SMBJ8.5CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1060SMBJ8.5CAHM3_A/I Datasheet

Current PartRFQ

SMBJ8.5CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 977SMBJ8.5CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ8.5CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Breakdown (Min): 9.44V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Current - Peak Pulse (10/1000µs): 41.7A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The substitute part SMBJ8.5CAHM3_B/I matches all electrical specifications and mechanical requirements. The primary distinction is product status: the original part is obsolete, while the substitute is active and available in Tape & Reel (TR) packaging.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ8.5CAHM3_B/I is the direct equivalent substitute for the obsolete SMBJ8.5CAHM3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications and mechanical form factors. Both maintain AEC-Q101 automotive qualification and ROHS3 compliance.

The substitute part is currently in active production status, ensuring long-term availability and supply chain stability. The packaging difference (Tape & Reel for the substitute versus standard packaging for the original) does not affect electrical or mechanical compatibility and is a standard industry practice for active production components.

Frequently Asked Questions (FAQ)

Q: Are the SMBJ8.5CAHM3_A/I and SMBJ8.5CAHM3_B/I electrically identical?

A: Yes. Both parts share identical voltage ratings (8.5V reverse standoff, 9.44V breakdown minimum, 14.4V clamping maximum), peak pulse current (41.7A), power dissipation (600W), operating temperature range (-55°C to 150°C), and bidirectional channel configuration (1 channel).

Q: Can I use SMBJ8.5CAHM3_B/I as a direct replacement in existing designs?

A: Yes. The substitute part is mechanically and electrically equivalent. Both use the DO-214AA (SMB) surface mount package and are qualified to AEC-Q101 automotive standards.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. The SMBJ8.5CAHM3_A/I is obsolete, while the SMBJ8.5CAHM3_B/I is active and available. The substitute is supplied in Tape & Reel packaging, which is standard for active production components.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the SMBJ8.5CAHM3_A/I and SMBJ8.5CAHM3_B/I are ROHS3 compliant and REACH unaffected.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use the same DO-214AA (SMB) package footprint and are suitable for automated surface mount assembly processes.